The race group was fined 6,500 after the athlete was taken to hospital by horse instead of an ambulance.
The event took place in March at Sedgefield Racecourse in County Durham.
The disciplinary panel of the British Horseracing Authority (BHA) found that the course did not comply with five “general guidelines” in its Rules of Racing.
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They kept the identity of the injured driver private, but it was reported that he suffered an injury to his left collarbone and shoulder blade after the crash, and was examined by a doctor during the race.
He was cleared to run again, but said he was still in pain, which resulted in a doctor advising him to go to A&E.
By all means the ambulance crew left the scene, and he was taken away in a horse-drawn carriage with the medical staff following.
“General instructions do not require personal transportation to the hospital with an escort from a qualified physician, as here, in a car,” the BHA board said.
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He also added that AGASO was too much of a pain to get into the following car.
Other defects at the venue included a non-working phone line and “tired, worn-out rooms that didn’t make the clinic area clean.”
The race has acknowledged “errors and shortcomings” and an inspection carried out in April which “significant progress”.